This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

Two insane asylum bodies embalmed by an amateur.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

The world's largest fully steerable radio telescope.

The highest point in Virginia can only be reached by passing through ponies and flowers.

An abandoned 1920s school with a mysterious history.

A cult archaeology conspiracy theory claims these West Virginia petroglyphs were written by Irish monks in Ogham.

Bizarre and inspired combination store selling only two items: tires and bibles.

An abandoned theme park with a strange and tumultuous past.

A local scoured more than 1,000 acres for stone to create his masterpiece.

The world's longest known cave system.

Make your reservation to have coffee with some kitties.

A nondescript Seattle restaurant inherited a piece of European history.

Bonsai trees that are up to a thousand years old.

One man's eclectic collection of treasures found at sea.

This Oregon farm is dedicated to teaching people the professional art of tree climbing.

The seamy, underground secrets of Portland's criminal past.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.